Superheater-boiler.



J. P. SNEDDON.

SUPERHEATER BOILER.

APPLICATION FILED 113B.19, 1907.

973,71 '7, Patentfad Oct. 25, 1910.

WITNESSES Mal/wy WML vnr Nonms PE1-:ns cc.. wAsHuvcrcN, n, e.

- sil l UNITED sraaasgrarnnr OFFICE.

JAMES P. SNEDDON, OF BARBERTON, OHIO, ASSIGNOR T0 THE BABCOCK & WILCOXCOMPANY, 0F NEW YORK, N.v Y., A CORPORATION OF NEW JERSEY.

SUPERHEATER-BOILER.

Application filed February 19, 1907.

To all whom it 'may concern:

Be it known that I, JAMES P. SNnnnoN, of Barberton, Summit county, Ohio,have invented a new and useful Superheater- Boiler, of which. thefollowing is a full, clear, and exact description, reference being hadto the accompanying drawings, forming part of thisl specification.

In the drawing I have shown a sectional. side elevation of one form ofmy improved superheater boiler.

My invention relates to the class of superheater boilers, and moreespecially to that type wherein the gases flow in up and down passesover successive sets of water tubes connecting upper and lowertransverse drums.

The object of the invention is to provide a simple, cheap and elicientsuperheater boiler of this type, in which the degree of superheat may bevaried by varying the path of the gases over the superheating tubes.

A further object of the invention is to combine the U-shaped superheaterwith a boiler of this type, wherein the superheater occupies a pass ofits own between any suitable baflles, with water-heating surface betweenit and the source of heat.

In the drawing, 2 and 3 represent upper transverse steam and waterdrums, connected by banks of tubes 4 and 5 with a transverse mud drum 6.The flame-and gases arisin from the furnace 7 are directed up among t etubes 4 by the rear baffle 8,

4and thence flow down between such batlle and the baffle 9 and riseamong the tubes 5 to their upper ends and then pass over the top ofbaffle 10 to the outlet fiue l1.

In the second pass for the gases between the baflles 8 and 9, I providethe superheater, which in this form consists of U-shaped tubes l2connecting the upper boxes 13 and 14 placed in the roof of the setting.These boxes extend transversely of the setting, and the box 13 isconnected with the steam space of the drum 3 by a pipe 15, the outletpipe 16 for the superheated steam being connected to the other box 14.In this form the superheater is placed in the rear portion of theV-shaped space between the baliies 8 and 9, and at the upper part of thebaille 8 I place the pivoted adjustable batl'le shelf 17 havin operatingchain 18 leading up through t e roof to a drum on the shaft ofSpecification of Letters Patent.

Patented Oct. 25, 1910.

Serial No. 358,170.

chain pulley 19. This chain pulley is provided with an endless operatingchain 2O which hangs down within reach of the operator; and by it he mayadjust the position of the shelf 17 to allow the gases to shortcircuitmore or less over the superheater tubes, thus changing the amount ofsuperlieat. In the form of boiler' shown, the drums 2 and 3 areconnected by water circulators 21 and by steam circulators 22, steampassing from drum 2 back to drum 3, and then entering the superheater.

The advantages of my invention result from the location of the U-sliapedsuperheater, from the means for adjusting the degree of superheat whilethe boiler is operated, and the compactness and efficiency of theconstruction.

Changes may be made in the form and arrangement of the boiler', theposition of the superheater, the means for varying the path of thegases, &c., without departing from my invention.

I claim 1. The combination with a boiler of the transverse drum,multiple bank, serial pass type, of a superheater, constituting theentire heating surface of the second pass, and an adjustable bailleshelf adjacent the bottom of the entrance to the pass arranged to varythe flow of the gases over the superheater; substantially as described.

2. A superheater boiler of the transverse drum, multiple bank, serialpass type, having the superheater located in a pass in the rear of thefirst pass, and in the normal path of the gases, and an adjustablebatl'le adjacent the bottom of the entrance to the pass arranged in thepass with the superheater to vary the flow of the gases over thesuperheater tubes; substantially as described.

The combination with a boiler of the transverse drum, multiple bank,serial pass, type, having a triangular shaped pass in the rear of thefirst pass, a superheater set in said triangular shaped pass, and aswinging baille in front of the superheater in the normal path of thegases in said pass and at the bottom of the entrance to the pass, andexternal means for adjusting the swinging battle during the operation ofthe-boiler; substantially as described.

4. In a boiler of the transverse drum, multiple bank, upri ht serialpass type, a superheater in one o the passes, and an adjustable bafflehaving a connection extending to cally extending tubes connected toboxes loa point outside the boiler, the superheater cated at the roof ofthe setting, and means and baflle being in the normal path of the at theentrance to the pass for varying the gaseous ow in the saine pass andthe baflie flow of the gases over the superheater; sub- 15 5 beinglocated at the bottom of the entrance stantially as described.

to the ass; substantially as described. In testimon)7 whereof, I havehereunto set 5. T e combination with a. boiler of the my hand.transverse drum, multiple bank, serial pass, JAMES P. SNEDDON. type, ofa superheater 1n a pass back of the Witnesses: 10 first pass and in thenormal flow of the J. C. FRANK,

gases, said superheater consisting of verti- A. H. KIRKLAND.

